Test enable tethering permission and stopAllTethering

1. Test whether start tethering is gated by suitable permission.
2. Test stopAllTethering

Bug: 153613718
Test: atest CtsTetheringTest

Change-Id: I38702886ea355e1aec8eb8ac404fdd46a44582e3
2 files changed
tree: 0fed280ff5ba46f879ef387a68f195e3ddf1b663
  1. tests/